This commit adds the initial technical plan for the 063-entra-signin feature. The plan outlines the high-level architecture, key components, database changes, test plan, and deployment considerations based on the clarified feature specification.
The plan addresses:
- Authentication flow via Laravel Socialite and Entra ID.
- User provisioning and upsert logic.
- Post-login routing based on tenant memberships, including a dedicated chooser page for multiple memberships.
- Handling of disabled user logins.
- Database schema details for Entra ID fields.
- Comprehensive test coverage using Pest (unit, feature, browser tests).
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